Combined typewriting and comput



24, 3 A. G. F. KUROWSKI COMBINED TYPEWRITING AND COMPUTING MACHINE Original Filed May 5, 1950 4 SheetsSheet l INVENTOR= ATTO Aug. 24, 1937.

FIG 2.

A. e. F. KUROWSKI 2,090,845

COMBINED TYPEWRITING AND COMPUTING MACHINE Original Filed May 55, 1930 4 Sheets-Sheet 2 JOHN DOE CO.

Edward Sm'h Munh :5. 29.

INVENTORI ATTO Y.

1937. A. G. F. KUROWSKI COMBINED TYPEWRITING AND COMPUTING MACHINE Original Filed May 3, 1930 4 Sheets-Sheet 3 AT TO Y.

g- 1937. A. G. F. KUROWSKI 2,090,845

COMBINED TYPEWRITING AND COMPUTING MACHINE Original Filed May 3, 1930 4 Sheets-Sheet 4 INVENTOR= Patented Aug. 24, 1937 UNITED STATES COMBINED TYPEWRITING AND COMPUT- ING MACHINE Alfred F. Kurowski, Brooklyn, N. Y., assignor, by mesne assignments, to Underwood Elliott Fisher Company, New York, N. Y., a corporation of Delaware Application May 3, 1930, Serial No. 449,430 Renewed November 21, 1935 20 Claims. This invention relates toa machine for typewriting certain data upon an accounting sheet, y

as, for example, the name of a customer or a workman, and then effecting computations upon other portions of the same line on the sheet, by

means of a combined adding and printing mechanism.

The Sundstrand is a well-known adding and printing mechanism having nine digit keys and provided with a nest of digit types and bars, each bar controllable by any of the nine keys. The principal aim of the present invention is to increase the scope of the Sundstrand class of adding machines by making provision for typing alphabetically and numerically upon the same sheet and line.

There is employedfor this purpose a. standard typewriter, and the invention is shown as in the nature of a modified typewriting machine of the Underwood standard type, combined with a modified adding machine of the Sundstrand type, the combined machine having therefore two keyboards.

As the invention is carried out, the keyboards are placed side by side and closely together, for

convenience in operating both keyboards in working upon the same sheet.

The Underwood typewriter is provided with a greatly lengthened carriage for use in common with both the typewriting mechanism and the adding mechanism; the usual paper-carrier of the Sundstrand adding mechanism being omitted. The movements of the carriage are controllable in part by a tabulatingmechanism, which includes carriage-release and carriage-stop devices mounted in the usual position at the back of the typewriting machine. The carriage-tabulating is controlled at the typewriter-keyboard.

The two modified machines can be practically combined, as aforesaid, without the necessity of an undue amount of reconstruction. An extra long Underwood typewriter-carriage can be employed; and it can be so arranged upon the combined machine as to give it a short range of travel for typewriting purposes, and also a sufficient additional range of travel for adding and itemizing purposes. The typewriter-carriage ways or tracks at the. front and rear are made special, in that they are prolonged to the right across the adding mechanism, so that the range of' travel of the lengthened carriage begins at one side of the typewriter and extends to the opposite side of the adding mechanism. The carriage tracks may be similar to those which are regularly employed on Underwood extrawidth machines, but said tracks may not be extended from the typewriter at the left-hand side thereof, so that the carriage may travel to the left, in letter-feeding direction, only enough to accommodate the adding types when printing 5 upon the extreme right-hand margin of the work-sheet carried by the platen that is mounted on the carriage.

In placing the modified adding machine and the modified standard typewriting machine so 10 closely together, a difficulty arises in fitting and joining one machine to the other, in view of the necessity of impressing the typewriter-types and the adding types upon the same line on the worksheet. The body of the Sundstrand adding ma- 1;) chine cannot be elevated so high as to meet this requirement, because of the fact that the platen must be immediately in rear of the adding types, and to meet this difliculty the Sundstrand machine is nested under and extends back far beneath the side arm which carries one end of the rear carriage-track of the standard typewriter having an extra long carriage. The arm which carries the right-hand end of the front typewritercarriage-track also overhangs the body of the Sundstrand machine. These trackarms must overhang the body of the Sundstrand machine front and rear, thus necessitating that the latter stand at such a height that the types would be much below the platen.

To meet this difficulty the vertically sliding type carriers or bars at the top of the Sundstrand machine are lengthened or extended upwardly an inch or more, and the shafts which drive the ink-ribbon spools are similarly ex- F tended. The hammers which drive the types are also lengthened upwardly in a manner to enable them to perform their usual functions.

The Underwood standard typewriter can be placed upon a block or platform, and the Sund- 40 strand mechanism can be placed upon a lower platform but quite close to the typewriter.

At this elevation, the Sundstrand casing may be nested under the rightward projecting arms of the typewriting machine. The two keyboards 45 are nearly on a level.

The carriage is always under the tension of the usual Underwood propelling spring, and moves step by step at the typewriting operation under the control of the typewriter-keys.

At the printing operation of the adding mechanism, it is desired to keep the paper-carriage stationary, and itis contrived to cause the general operator of the adding mechanism to lock the carriage a'gainst the possibility of travel 5 while the adding types are elevated. The digit type-bars are projected up to a point above the level of the typewriter-carriage, and, by locking the carriage at this time, it is rendered impossible for it to jump and to collide at its righthand end with the upwardly projected digit typebars.

The carriage-locking mechanism, however, is not operated when the typewriter-keys are being manipulated, as it is not desired to prevent carriage-feeding at such time.

The aforesaid means for locking the carriage is automatically effective at every position to which the carriage may be set within the adding zone. The carriage is out of the adding zone, whenever it is moved so far to the left that the right-hand end of the platen is withdrawn from the field of the listing types, which are operated by the hammers.

For preventing accidental operation of the type-hammers when the platen is withdrawn from the adding zone, the carriage is provided with means for preventing operation of the general operator. Mounted upon the carriage is a bar, which is in the path of a member which automatically locks the carriage. The same member will lock the carriage when the platen is in the listing zone, and will also co-operate with said carriage-bar to lock the general operator when the platen is out of the listing zone.

Said locking member is in the form of a general-operator dog, which can enter any of many notches that are cut at the proper location in the said bar provided upon the carriage, but the uncut portion of the bar prevents the operation of the dog and the general operator connected thereto. listing zone, the dog can enter any notch and lock the carriage, while when the carriage is out of the listing zone, the dog cannot enter any notch, but will strike and become arrested by the bar, and as a result the operation of the general operator is prevented, and the hammers cannot strike against the listing type-bars.-

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 11s a perspective view of. the combined typewriting machine and the Sundstrand adding machine, looking diagonally across the unit from the rear.

Figure 2 is a plan view to illustrate the cooperative relation of the two mechanisms, and especially the relation of an Underwood long car- -riage to the two independent printing systems.

Figure 3 is an enlarged elevation looking at the right-hand end of the Sundstrand machine, with portions of the frame removed to expose the operative relation of certain parts thereof.

Figure 4 is a reduced plan section of the righthand end of the carriage and the margin controls therefor.

Figure 5 is a diagrammatic view, showing the typewriter-carriage locked stationary with the frame while the type-bars of the adding machine are raised to the printing position by their general operator.

Figure 6 is a view of the same parts shown in Figure 5, but it is assumed that the right-hand end bar of the carriage is over the type-bars and would interfere with the raising of the bars,

or the carriage has been shifted outside the listing zone, either condition prematurely arresting the movement of the general operator and preventing the lifting of the type-bars.

Hence, whenthe carriage is in the Figure '7 is a perspective view of the carriagelocking connections shown in Figure 5.

Figure 8 is a reduced plan view of the left-hand end of the carriage, showing the marginal stop position for the typing of the first character on a work-sheet.

In the assembly of these two machines for cooperative operation, a base In is provided with a floor-section II, and upon this floor the Sundstrand element A is positioned with its feet l2 thereon. The Sundstrand frame is so related to the platen-carriage-frame l3 of the Underwood typewriting unit B, that the carriage may travel thereover; and for this position of the carriage the floor-section l4 may be at the proper height above the floor-section ll, supporting the feet I5 of the typewriting unit. The machine-units A and B are closely positioned side by side.

The Underwood unit is a standard machine provided with an extra-long carriage. The machine-frame I6 has front and rear arms I! and I8 lengthened beyond the frame to the right and left sufficiently to support extra long front and rear carriage-rails l9 and 20. The rear rail 20 is the usual round rod suspended by plates 2| secured to the lugs l8, and the carriage has two spaced-apart bearing lugs or collars 22 that ride upon the rear rail 20. The front rail I9 is channel-shaped to closely house a series of rolls 23 mounted along a front rail 24 of the carriageframe i3 to ride upon the lower track l9 and having working clearance with the upper track i9 to prevent uplift of the carriage.

This long carriage supports the usual extra long platen 25, the usual line-space lever 26 and connections suitable to line-space the platen. The carriage-rack 21 is engageable with a pinion 28 and escapement-wheel 28 provided with the usual Underwood escapement-dogs', not shown, that control the step-by-step feed of the carriage under the tension of the carriage-motor l3.

It will be seen in Figure 1 that the right-hand ends of the rails l9 and 20 only project slightly beyond the arms I! and I8, while the left-hand ends of both rails extend over and across the Sundstrand unit A, which provides abnormally long runways for the carriage to cross the printing systems of both units A and B.

Glancing at Figure 3, the keyboard 29 of the Sundstrand unit is practically on the level with the keyboard 30 of the typewriter, and Figure 2 shows that the operator's hands can jump from one keyboard to the other without any unusual effort.

In arranging the relative height of the two units A and B to provide clearance for the travel of the carriage of the unit B over the unit A, the front-strike printing line of the platen onthe unit B establishes a new line-printing position for the type-bars of the unit A, which position requires that the type-bars 3| of the adding mechanism be lengthened upwardly; otherwise these type-bars are of standard Sundstrand .dimension.

The lengthening of the type-bars 3| requires the lengthening of the co-operating hammers 32 that drive the types 3| to print and the raising of the ribbon-spools 33 so that the top edge of the ribbon 34 will normally expose the printing line; the ribbon being vibrated upwardly by suitable ribbon-guiding and ribbonshifting devices 3; before the printing of the types 3|.

To maintain a maximum compactness of the two co-opemting mechanisms A and B, the righthand carriage-end I3 just clears the ribbonspools 33 and the upper ends of the inactive type-bars 3|, and under these conditions the type-bars 3| might be raised to a key-set position and collide with the under side of the carriage-end I3, or the carriage l3 might be shifted either way sothat said end |3 will collide with the raised type-bars to injure them.

In the normal or adding listing operation of the machine, these conditions would not appear, but, to forestall the accidental operation of the adding type-bars 3| except at a predetermined adding zone along the platen, means are provided to prevent the lifting of the type-bars 3| except in an adding listing zone, and, by the same means, the carriage is locked to prevent movement thereof while the type-bars 3| are in their raised printing positions.

To this end, there may be attached to the rear bar 36 of the carriage l3 by screws 31 an angle-bar 38 having rack-teeth '39 out along one edge thereof. These teeth have a pitch equal to the letter-spacing of the carriage, and have a length equivalent to the length of the listing field along the platen. To co-operate with these teeth 39, a dog 40 may be mounted upon the machineframe to swing into interlock with the teeth 39 to hold the carriage stationary until released by the withdrawal of the dog from the rack-teeth. Referring to Figure one lug l8 supports a stud 4| secured thereto by a set-screw 42 to provide a support for the dog 40 as upon a pivot-screw 43 threaded into the free end of the stud. The dog may be further supported by a plate 44 secured at one end to the lug H! to overhang the stud 4|, and includes a slot 45 to guide the upper end of the dog 40. The dog 40 is movable in a rackengaging direction by a spring 46 coiled about the stud 4|. The stud 4| is eccentric to its reduced end 4 l and the rotation of the stud about the end 4| set in the lug l8 and secured by the screw 42 provides a convenient means for adjusting the dog 40 to the rack 39 or for adjusting the dog to other parts, presently to be described.

The dog 40 includes an extension 41 terminating in a foot 48 engaging a stud 49 which holds the dog 40 out of the path of the rack-teeth and against the tension of the spring 46.. The stud 49 projects from the face of an arm 50 forming a part of a crank-arm 5|, pivotally supported on the frame of the unit A by a stationary stud 52. The lower end of the arm 5| has a pivotal connection 53 with one end of a link 54 having a pivotal connection 55 with a crank-arm 56 secured to a rock-shaft 51. To rock the shaft 51, there may be a spring arm 58 secured thereto and having a pivotal connection 59 with a link 60 having a stud 6| at its other end to rest in lost-motion arm 62 made fast to a main the present invention, however, the initial portion of the movement of the general operator 64 (to full-line position at Figure 6) vibrates the arm 5|, withdraws the stud 49 from the foot 48, and allows the spring 46 to shift the dog-4|| into interlock with the rack 39, to lock the carriage against displacement during the operation of the printing-type mechanism operated by the .bar 38 without any teeth 39.

arm 5|, and when so engaged prevents a full forward sweep of the general operator 64 under certain conditions, as follows.

The dog-controlling train 60, 5B, 54, 5| from the general operator 64 is disposed normally in position as shown at Figure 3, and when the general operator is pulled forwardly to the fullline position of Figure 5, the stud 49 releases the dog 40, so that its spring 46 causes the dog to interlock with the rack 39. The stud 65, in following the extension 41 of the dog 40, swings the hook 69 out of the path of the lug 1D, and permits further forward sweep of the general operator 64 to the full-line position of Figure 5, completing the adding and listing cycle of the machine, while the carriage is locked by the dog 40. But if dog 40 cannot enter a notch, then the general operator 64 is arrested midstroke, as in full lines at Figure 6.

Figure 2 shows sections 38 and 3|! of the These sections prevent operation of the adding and listing mechanism when the carriage is in certain zones. When the carriage is shifted leftward of Figure 2 to position the carriage-end |3 directly over the adding type-bars 3|, the section 38 of the bar 38 will be in the path of the dog 40 and intercept or prevent full vibration of the dog by spring 46, as shown at Figure 6. This interference with the. motion of the dog 40, causes it to fail to remove the hook 69 from the path of the lug 10. The hook hence checks the forward swing of the general operator 64 at the full-line mid-position in Figure 6, so that the printing type-bars 3| are not lifted by the movement of the general operator, and cannot collide with the carriageend, and other objections are also overcome.

The dog 4|! is normally held out of mesh with rack 39 by means of pin-stop 49 on general-operator member 5|. When the arm 64 is pulled forwardly from the Figure 3 position, pin-stop 49 releases a dog 41', 40, which falls into a notch in the rack 39, whereupon the general operator 64 is pulled forwardly the remainder of its stroke, as seen in full lines at Figure 5.

The rack 39 is movable out of range of the dog 40, as it is not desired to manipulate the general operator when the paper-carriage is in position for typewriting. At such times the full or uncut portions 38, 38 of the bar 36 serve as interceptors of the dog 40, to prevent vibration of the latter, and thereby prevent cycling of the general operator of the adding and printing mechanism. This preventing means includes a latch 66, having tooth 69, which is normally in the path of a lug 10 upon member 5|, see Figure 3. So long as the dog 40 is held back by the uncut bars 38, 38 the pin 65 prevents the spring 68 from swinging the latch 66 to its released position. Hence only a slight movement of-5| can occur before its lug 10 is arrested by the latchtooth 69. Atthis time the parts are in position seen at full lines in Figure 6, and cycling of the general operator is prevented.

The mechanism therefore prevents the cycling of the general operator, and striking of the hammers against the listing types when the carriage is not in the proper zone therefor, and also prevents accidental letter-feeding movement of the carriage during the cycling of the general operator, and independently of any key on the keyboard.

To quickly position the carriage for beginning either style of printing, marginal devices are employed to arrest the rightward throw of the carriage. To position the carriage for the beginning of a typewritten line, the usual Underwood marginal devices are employed which include a rod 1 l-, Figures 4 and 8, on the frame, a marginal stop 12 adjustable along said rod and a carriagestop 13 on the carriage to engage the marginal stop. When the carriage is shifted rightward by the line-space lever 26 in the usual manner, the carriage will be arrested by the stop 12 at the proper position to begin typewriting, as indicated at Figure 8.

After the typewritten line is finished and it is desired to continue the same line with listings printed by the types 3|, the carriage may be thrown to the right to be rearrested by the marginal stop 12, but, in the present example of a work-sheet, the carriage l3 must be moved rightward beyond the stop 12 to bring the first column of the listing zone on the sheet to register with the type-bars 3|. For this operation, the carriage-stop 13 has the form of a lever fulcrumed upon the carriage-frame and provided with a finger-piece 14 to lift the stop I3 free of the marginal stop 12 to permit the carriage to have a further movement rightward for registering the first listing column with the bars 3i, and this position may be determined by a stop-screw 15 upon the rear rail arresting the rightward movement of the bearing lug 22. To determine the marginal stop position for both the printing and the listing zone of the carriage, the usual Underwood scales and pointers may be employed at the front rail of the machine and at the front of the platen.

In the typewriting zone, the usual types print to the step-by-step movement of the carriagefeed. In the listing zone the carriage is columnspaced to a column position and the whole listing entry printed simultaneously. Hence the usual tabulating mechanism, such as a key-operated stop I6, Figure 1 operates in the usual Underwood manner to release the carriage and engage a column-stop '11 on the carriage to jump the carriage from one column to another column. The carriage is feedable by the typewriter-keys throughout its run, to enable the machine to type full-width work-slgets without adding, when desired.

The types of the 'bars 3| have the same letterspace width 'as the typewriting types 8i and usually have a greater height toprint a much larger and more prominent numeral, and such a record is more desirable than the typewritten numeral record. Furthermore, the selecting and setting up of a whole column-listing entry to be subsequently printed simultaneously as a unitlisting has many advantages over the singlytyped entries, especially where premature set-ups are made which subsequently enter into computative operations.

For this and other reasons, it is an advantage to employ the listing features of a standard listing adding machine in connection with a standard typewriting machine, so that the list of digits may be set up and subsequently cleared with or "without addition .or subtraction, by a manipulation of nine numeral-keys and computative control keys.

A work-sheet is illustrated at Figure 2 where the printed form 18 is a one-line time-sheet record. The left-hand section of the line indicated by :c is a typewriting zone, and the remainder of the line indicated by y is for numeral records recorded by the group of listing type-bars 3|, and the division between these two zones is indicated by the column line 2. After typewriting within the zone a:, the carriage is thrown rightward over the marginal stop 12 to the fixed stop 15, and the first column in zone 11 will be aligned to the group of listing type-bars 3 I. The keys 29 are depressed to selectively set up 8347 upon the bars 3|, and a non-add key depressed, the general operator thrown forwardly and the 8347 types are hammered against the work-sheet to print, and the mechanisms restored to normal positions. During this printing operation, the carriage is locked by the dog 40 and released by the dog upon the release of the general operator 64. The carriage has not shifted during this operation, and the depression of the tabulator-key 80 releases and arrests the carriage at the next column position and the 35.78 listed, and successive operations list the amounts 4.73 and 40.51, and so on. If the total 40.51 is to be kept in the totalizer for a grand total, the general operator is operated twice. This lists the 40.51 without affecting the totalizer.

The subsequent line-listings in the zone 11 are made according to the character of each 001- umn-record which may simply list a number, list and add a number, or list and subtract a number, according to the manipulation of the keyboard 29. It will be understood that a change of worksheet form will change the mode of operation, but it is desirable that the dividing line 2 between the two zones shall remain at the same location of the platen travel because of the rack 39.

The unit A may have a bichrome ribbon-control mechanism of well-known form to list in difierent colors, and the unit B may be similarly equipped for typing in two colors, both mechanisms being shown at Figure 1.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1.-In a typewriting mechanism and a listing computing mechanism arranged side by side for independent printing operations, a letter-feeding carriage having a platen common to both mechanisms, said computing mechanism having a general operator for cycling the listing mechanism for each listing operation, said carriage being mounted for letter-feeding movement in a typing zone and being also settable. to listing position in an adding zone, means co-operative with the general operator to prevent the letter-feeding of the carriage in the adding zone while the listing mechanism is being cycled to print, said preventing means including a rack on the carriage, having teeth spaced the same-as the carriage-spacing, a dog on the frame, tensioned to interlock with the rack to lock the carriage, said rack movable with said carriage out of position for cooperation with the dog, means to enable the general operator to hold the dog out of engagement with the rack, and means. upon the carriage adapted to block the movement of said dog, said dog then being efiective to cause the arrest of the general operator when the rack-is out of position for cooperation with'the dog. 2. In a typewriting mechanism and a listing.

computing mechanism arranged side by side for independent printing operations, a letter-feeding carriage having a platen common to both mechanisms, said computing mechanism having a general operator for cycling the listing mechanism for each listing operation, means co-operative with the general operator to prevent the feeding of the carriage while the listing mechanism is being cycled to print, said preventing means including a rack on the carriage, a dog on the frame, tensioned to interlock with the rack to lock the carriage, said rack movable out of position for co-operation with the dog, means to enable the general operator to hold the dog out of engagement with the rack, the carriagehaving a bar engageable by the dog when said rack is out of effective position, said bar in the. path of said dog to lock it, a lug on the general operator, and a latch to engage the lug and arrest the movement of the general operator when the dog is arrested by the bar, said dog having means normally holding said latch in locking position, but permitting thev latch to release the general operator when the dog meshes with the rack.

3. In a typewriting mechanism and a nine-key listing computing mechanism arranged side by side, each mechanism having an independent printing system, the combination of a carriage having a platen common to both printing systems for writing in one zone and listing in another zone, said carriage letter-feeding in both zones, a rack-bar fixed on the carriage and having teeth coextensive with the listing zone of the platen, said rack-bar extending beyond said teeth, a general operator for cycling the listing mechanism and its printing system, a dog having a connection with said general operator and operable to engage the rack and hold the carriage stationary at any letter-space position in the listing zone, said dog being held against operation by the rack bar extension outside the listing zone thereof, and means controlled by said dog to prevent the cycling of the general operator.

In a typewriting mechanism and an adding and listing mechanism arranged side by side for independent operation, a letter-feeding carriage having a frame and a platen common to both mechanisms, said carriage having a portion of its frame in front of the platen, said adding mechanism having a general operator for cycling the same, including the lifting of hammer-operated type-barssimultaneously to printing position in front of the platen, the lifted type-bars projecting into the path of the carriage-frame, and means to enable the carriageto prevent the general operator from raising the type-bars into collision with the can'iage said preventing means.

5. In a machine of the class described, havinga typewriter-mechanism and also having an adding and listing mechanism, and having a common letter-feeding paper-carriage provided with a platen, and said adding and listing mechanism having a general operator effective after a number has been set up, said carriage having a limited range of movement constituting a field of operation of the listingctypes, and also having a movement through a ty writing zone, the combination with the carriage and the general operator, of means controlled by the carriage for locking said general operator against operation when said platen is in any letter-feeding position out of said listing field, and in said typewriting zone,

said dog and of the general operator when the platen is in said listing field; said dog, when inserted in any notch, being effective to prevent movement of the carriage.

6. In a typewriting mechanism and an adding and listing mechanism arranged side by side for independent operation, a letter-feeding carriage having a frame and a platen common to both mechanisms, said carriage having a portion of its frame. in front of the platen, said adding mechanism having a general operator for cycling the same, including the lifting of hammer-operated type-bars simultaneously to .printing position in front of the platen, the lifted type-bars projecting into the path of the carriage-frame, and means to enable the carriage to prevent the general operator from raising the type-bars into collision with the carriage, and for enabling the general operator to prevent movements of the carriage while the type-bars are in elevated positions in the path of the carriage said means including a dog associated with the general operator and cooperative with the carriage at positions of collision to prematurely arrest the movement of the general operator and the type-bars, said means also including a rack on the carriage having teeth spaced the same as carriage spacing, said dog being tensioned to interlock with said teeth'to lock the carriage against movement when the type bars are raised. 1

7. Astandard commercial typewriting machine and a standard commercial adding machine converted by joining into a machine having one paper-carriage for both typewriting and adding, said converted machine including a standard "front-strike type-bar typewriting machine having an extra-length platen, carriage and carriagerails, and also including a standard nine-key adding machine having group-printing types and mounted directly at the side of the typewriting machine and its type-bars being lengthened upwardly, to enable them to print upon the same work-sheet and platen in line with the impressions of the typewriter-types, said typewriting machine having extra-length carriage-tracks and overhanging arms upon which the tracks are mounted, said adding machine being nested di rectly under the overhanging carriage-tracks oi' the typewriting machine, said group-printing type-bars being movable into the path of said typewriter-carriage, and means for preventing collision between said group-printing type-bars and said carriage, said collision-preventing means including devices effective, dependent on the carriage position, to prevent movement of the groupprinting type-bars when the carriage is positioned outside oi a computing zone, or to prevent movement of said carriage when said groupprinting devices are actuated in said zone.

8. A combined typewriting mechanism and computing and listing mechanism arranged side by side for independent printing operation, said typewriting mechanism including a letter-feeding carriage having a platen common to both said mechanisms, said computing mechanism having a general operator, said carriage and said computing mechanism having portions movable in certain positions of the carriage to conflict one with the other in the operation of the machine and means to enable the carriage while said conflicts can take place to prevent operation of the general operator, said preventing means including a dog, a bar on the carriage controlling said dog, and a pawl controlled by said dog to lock the general operator.

9. A combined typewriting and computing machine, a paper-carriage and key-operated typebars and having computer type-bars elevatable by a cycling mechanism into the path of the end of the typewriter-carriage, said carriage being common to the typewriting mechanism and the computing mechanism, and usable with either independently of the other mechanism, and a plurality of means operative, respectively, depending on the carriage position, for preventing the lifting of the type-bars of the computer when the end of the carriage is in position over said type-bars, and for preventing the movement of the end of the carriage against the computer bars, if the latter are in elevated position.

10. A combined typewriting, adding and listing machine having, in combination, singlyoperable typewriter-types, key-set adding-listing type-bars, a cycling operator for said addinglisting type-bars, a carriage carrying a common platen laterally of said types and adding-listing type-bars, the latter being movable into the path of said carriage,-and means for preventing collision between said carriage and adding-listing type-bars, said collision-preventing means including a dog, a device controlled by said dog for locking said cycling operator, and means on said carriage coacting with said cycling operator to control said dog and said cycling operator locking device to cause the dog to lock the carriage when the operator is cycled in a computing zone of the carriage, and to cause said locking device controlled by said dog to be effective to lock said cycling operator when the carriage is outside of said computing zone.

11. In combination, a typewriter, a computing key mechanism arranged laterally of the type writer for independent listing operations, a feedable carriage having a platen co-operable with either the typewriter or the'computing mechanism, said computing mechanism having a -general operator for cycling at each listing operation; and means controllable by the general operator at one position of the carriage travel, to prevent the feeding of the carriage while the listing mechanism is being cycled to print in a listing computing zone of the carriage; said looking means being inclusive of (1) a rack on the carriage, having teeth spaced the same as the carriage-spacing, (2) adog on the frame, (3) spring means normally tending to interlock the dog with the. rack to lock the carriage, (4) means co-operative with the general operator tohold the dog out of engagement with the rack, while the carriage is in the typewriting field; said computing mechanism including type-bars which at the cycling operation project into the path of the typewriter-carriage, and means controlled by said dog for preventing operation of the general operator when the carriage is incorrectly positioned, and thereby preventing collision between the type-bars and the carriage.

12. In a typewriting mechanism and a listing computing mechanism arranged side by side for independent printing operations, a letter-feeding carriage having a long platen common to both mechanisms and divisible into a typewriting zone and a;;.1 listing zone, the carriage having letterfeeding mechanism effective in both zones, tabulating devices operable to column-space the carriage for printing in the listing computing zone. said listing mechanism having a general operator for cycling the same for each listing printed in the computing zone, and means associated with the general operator efiective to disable the printing by the listing mechanism outside of the listing zone of the platen; said disabling means including a latch and controlling dog connected with the general operator and means on the carriage co-operative with said dog and latch to arrest premature movement of the general operator; said computing mechanism including elevatable type-bars which at the cycling operation project into the path of the typewriter-carriage; and means co-operative with said dog, when the general operator is cycled in the listing zone, to lock the carriage for preventing collision-between the carriage and said computing type-bars.

13. In a typewriting mechanism having a typewriting field and combined with an adding and listing mechanism having an adding field and adding keys and arranged at the side thereof for printing operations, and also combined with a letter-feeding carriage and platen common to both mechanisms, said carriage being movable from the typewriting field to the adding field, and. being under letter-feeding control while in either the typewriting field or the adding field, said adding and listing mechanism having a general operator for cycling the same after the digits of a number have been set up by the adding keys, the combination of means operable by the general operator at any letter-spacing position of the carriage in the adding field, to take the carriage out of the control of the letter-feeding devices with the adding and listing mechanism at the cycling of the general operator, said means inclusive of a rack on the carriage, co-operative with a dog connected with the general operator to be operated thereby to move it into interlock with the teeth of the rack, said dog being idle throughout the typewriting operation, and said rack having its teeth at letter-space intervals and being in position for locking by said dog against letterfeeding movement when the platen is in the adding field, and when and while the general operator is being operated, said adding and listing mechanism including type-bars which at the cycling operation project into the path of the typewriter-carriage; and means controlled by the carriage through said dog when the latter is outbetween the carriage and said adding and listing type-bars.

14. In a keyboard-controlled typewriting mechanism and an adding and listing mechanism mounted side by side and each mechanism having a printing system, and a carriage having a typewriting zone and a listing-adding zone, said carriage having letter-feeding mechanism effective for its entire length of travel, the combination of a rack fixed on the carriage and having teeth co-extensive with the listing zone of the platen, a general operator for cycling the listing mechanism and its printing system, and a dog engageable with said rack and releasable by said general operator to lock the carriage independently of all the keys and the feeding devices,

at any letter-feeding position of the carriage in the listing zone, the'generaI operator cycling its printing system while the dog remains stationary in engagement with the rack, and releasing the.

dog from the rack upon the conclusion of the cycle; said adding and listing mechanism including type-bars which at the cycling operation project into the path of the typewriter-carriage, and means effective, under control of the carriage through said dog, outside the listing zone, to prevent operation of the general operator for preventing collision between the carriage and said adding and listing type-bars.

15. In a keyboard-controlled typewriting mechanism and an adding and listing mechanism arranged side by side for independent printing operations, and a carriage which has letter-feed-- ing mechanism effectivethroughout the travel of the carriage, the latter having a long platen common to both mechanisms, and operable in a typing zone and a listing zone, the combination of adjustable tabulating devices operable to columnspace the carriage to any selected letter-feeding positions in the adding zone, for printing in different columns in the adding zone, said listing mechanism having a general operator for cycling the same, means co-operative with the carriage only in the listing zone and operable by the general operator only while the carriage is in the listing zone and effective to prevent any tabulating or letter-spacing of the carriage while a listing is being printed in any column; the adding and listing mechanism including type-bars which at the cycling operation project into the path of the typewriter-carriage; and means effective, under control of the carriage through said cooperative means, outside of the listing zone, for

I preventing operation of the general operator for preventing collision between the carriage and said adding and listing type-bars.

- 16. In a machine of the class described, having a typewriter-mechanism and also having an adding and listing mechanism, and having a common letter-feeding paper-carriage provided with a platen, and said adding andrlisting mechanism having a general operator effective after a number has been set up, said carriage having a limited range of movement constituting a field of operation of the listing types, and also having a typewriting zone, the combination with the carriage and the general operator, of a device controlled by the carriage, a second device controlled-by the first device for locking said general operator against operation when said platen is in any letter-feeding position out of said listing field and in said typewriting zone, said adding and listing mechanism including eievatable type-bars which at the cycling operation project into the path of the typewriter-carriage, and means effective through said first device, under control of said general operator, for locking said carriage to prevent collision between the carriage and said combination of a locking rack on the carriage,

corresponding with a computing zone, said rack having teeth at letter-space intervals, a dog,

, means normally tensioning said dog to interlock with said locking rack to lock the carriage, and

means restraining the dog from engagement with the locking rack, said dog being releasable by the initial movement of the general operator so that it can lock the rack and carriage, and being restorable to normal restrained position by the concluding movement of the general operator, said computing mechanism including type-bars which at the cycling operation project into the path of the typewriter-carriage, and means including said dog, eifective under control of the carriage when the latter is outside said computing zone, for preventing operation of said general operator to prevent collision between the carriage and said computing type-bars.

18. A combined typewriting mechanism and a computing and listing mechanism arranged side by side for independent printing operation, the typewriter having a letter-feeding carriage and a platen common to both said mechanisms, said listing mechanism having operable parts which may be projected into the path of movement of parts of the typewriter-carriage, said listing mechanism having a general operator for cycling the same, and means to prevent conflict between the operation of the carriage-parts and the parts of the listing mechanism, said preventing means including a control-bar movable with the carriage and having a general-operator-locking main portion and also having a rack-portion for locking the carriage and releasing the general operator, said preventing means also including a lockingtrain having a dog-device supported on the machine-frame and co-operable either with said train and main control-bar portion to .prevent operation of said general operator when the carriage is out of the adding zone; or with said rack-portion to permit said general operator to cycle and thereby lock said carriage when the carriage is in said adding zone.

19. In a machine of the class described, having a typewriter-mechanism and also having an adding and listing mechanism, and having a common letterfeeding paper carriage provided with a platen, and said adding and listing mechanism having a general operator effective after a number has been set up to project parts of the listing mechanism into. the path of the carriage, said carriage having a limited range of movement constituting a field of operation of the listing types, and also having a typewriting zone, the combination with the carriage and the general operator, of means controlled by the carriage for locking said general operator against operation when said platen is in letter-feeding position out of said listing field and in said typewriting zone, said means including a pawl, a bar on the carriage having a smooth portion, and a dog cooperative with'said smooth bar-portion, to cause the pawl to lock said general operator and prevent collision of the carriage and listing mechanism.

20. A combined typewriting and computinglisting machine having, in combination, singlyoperable typewriter-types and group-printingadding-listi ng type-bars, a step-by-step feeding carriage carrying a platen laterally of said typewriter-types and adding-listing type-bars, a cycling operator for said adding-listing type-bars, the latter being movable into the path of said carriage, and means operative to prevent untimely carriage travel and a smooth portion corresponding with a non-listing zone, and dog-means supported on the machine-frame and co-opera-' tive with said rack to lock the carriage depending 5 on said operator being cycled when the carriage is at a listing position, generai operator locking 

